Piston-packing.



PATENTED OCT. 27, 1903.

G. B. PRALEY.

PISTON PACKING. APPLICATION FILED ILY so. 1902.

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N0 MODEL.

(avi/fummo PATENTED 00T. 27, 1903.

G. B. PRALEY. PISTON PACKING.

APPLmATIoN FILED JULY 3o. 1902.

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UNITED STATES GEORGE B. FRALEY,

Patented ctober 27, 1903.

PATENT OFFICE.

OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORTO PlsToN-PACKING.

SPECIFICATION forming part of Letters Patent No. 742,784, dated October27, 1903. .111111102111011 nea July so, 1902. serai No'. 117,619. Nomoana To a/ZZ whom, it may concern,.-

Be it known that 1, GEORGE B. FRALEY, a

citizen of the United States, residing in the cityand county ofPhiladelphia, State of Penn- Sylvania, have invented a new and usefulImprovement in Piston-Packing, of which the following is aspecification.

This invention relates to a piston-packing capable for use in variouskinds of engines; no and the objects and advantages thereof will be setforth at length in the following description, while the novelty of theinvention will constitute the basis of the claims succeeding saiddescription. In the accompanying drawings, forming a part of thisspecification, Figure 1 represents a vertical sectional elevation of anengine, the piston of which is provided with packing including myimprovements. Fig. 2 is a seczo tional elevation, the section of whichis taken at substantially a right angle to that of Eig. 1. Likecharacters refer to like parts in both figures of the drawings.

The numeral 1 denotes a gas-engine pro- 2 5 vided with a crank-casing 2,furnished with the usual bearings 3 and 4, in which is mount. ed thecrank-shaft 5, to which are suitably,

united the connecting-rods 6 and 7, which are provided with the pistonsS and 9. These 3o pistons are adapted to traverse the cylinders 10 and11. Each of said pistons is provided with the usual snap-rings 12. Eachcylinder is shown surrounded by an annular chamber 13, into which asuitable fluid may be con- 3 5 ducted by way of the valve-inlet 15, andafter circulating through the same can be discharged from thevalve-outlet 14. As the said chambers 13 and the inlet and outlettherefor constitute no part of the present invention,

4o it is unnecessary to describe the same at length. Each piston isprovided with a cup 16, which ismade of leather or suitable material andwhich is adapted to act as a receptacle for oil, glycerin, or otherlubricating substances, it being seen that between the outer edge of thecup and the head of the piston and inner Wall of vthe cylinder. issituated a packing-ring 17, Which thus protects the edge and side ofsaid cup and prevents wearing of 5o the same.

The circular cups 16 are fastened to the upper ends of the pistons 8 and9 by means of circular plates or disks 1S, screws 19 or theirequivalents being passed through the plates, rings, and upper ends ofthe pistons, respectively, in order to unite the parts, the heads of thescrews being countersunk in the plates or disks in order to present noprotuberances on the upper faces of said disks. The packing-rings 17snugly fit in rabbets in the upper ends of the pistons, and their uppersides are shaped to agree with the corresponding portions of thepacking-rings, the fit between the rings and packings being a snug one.

The cups o r packings 16 are adapted to contain a lubricant, and theirouter edges or margins travel lightly in contact with the inner surfacesof the cylinders, whereby said surfaces are properly lubricated, and therings 17 in addition to preventing undue wear of the packing disks orcups 16 also limit the lateral `expansion of said cups, whereby thelatter cannot be unduly laterally expanded by the entering charges ofgas, as in case they 7 5 Were they would bind against the inner surfacesof the cylinders, and thereby affect the proper operation of the engine.i

The invention is not limited to use in connection with any particulartype of engine; but that shown is of a type using carbon dioXid as themotive agent, and in an engine of this kind it is the custom to employ aheater in the acting side of the cylinder. Such a heater is shown inFig. 2 and is denoted in a 85 general way by 20. This feature, as wellas the supply-valve mechanism, forms no part of the invention, and hencea detail description thereof is unnecessary. In said Fig. 2, however, Ihave shown an arrangement of gearing between the crank-shaft 5 and thesupply-valves, which I denote in a general way by 21.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination of a cylinder and a piston therein, a circular cupadapted to contain a lubricant, fastened to the upper end of the piston,constituting a packing and the outer Ioo edge of which is adapted totravel lightly in fit the outer portion of the cup and serving Contactwith the inner surface of the cylinto prevent the Wear of the eup. der,and a ring tted to the upper end of the 3. The combination ofa cylinderand a pis- 2c piston and shaped upon its upper side to ton therein,aeircular cup adapted to contain 5 snugly receive the outer portion ofthe cup a lubricant, fastened to the upper end of the and serving toprevent the Wear of said cup. piston, constituting a packing and theouter 2. The combination of acylinder and a pisedge ofwhich is adaptedto travel lightly in ton therein, a circular cup adapted to containContact with the inner surface of the cylinder, 25 a lubricant, fittedto the upper end of the pisand a ring tted in a rabbet in the upper endIo ton, constitutinga packingand the outer edge of the piston, shaped onthe upper side to of which is adapted to travel lightly in oonsnuglyreceive the outer portion of the cup tact with the inner surface of thecylinder, a. and servin g to prevent Wear on said cup. plate upon thecup, fastening devices extending through the plate, cup and upper end ofGEORGE B' FRALEY 15 the piston, respectively, to hold the parts to-Witnesses:

gather, and a ring tted to the upper end of JOHN A. WIEDERSHEIM, thepiston, shaped on its upper side to snugly WM. CANER WIEDERSHEIM.

